For use in both diesel and gasoline engines. Ideal for applications where the extra protection of a higher-viscosity oil is desired. The higher viscosity may help reduce motor oil consumption in equipment experiencing higher than normal oil usage rates while running lower viscosity lubricants.

AMSOIL, the leader in automotive synthetic lubrication,
produced the world’s first API qualified synthetic motor
oil in 1972. Trust the extensive experience of AMSOIL
The First in Synthetics® to do the best job protecting
your engine.

High-zinc formula guards
against wear

Ideal for flat-tappet cams

Resists deposits to help
keep engines clean

Convenience of use for gas
and diesel engines

Superior Wear Protection
Premium Protection Synthetic Motor Oil is high-viscosity oil engineered to protect
against metal-to-metal contact. It resists viscosity loss due to shear and is formulated
with a heavy treatment of zinc and other anti-wear additives for excellent protection
of gears, bearings, cam lobes and other high-pressure components in engines and
transmissions. Premium Protection Synthetic Motor Oil helps extend equipment life.

Resists Oxidation and
High-Temperature Breakdown
Premium Protection Synthetic Motor Oil is formulated to overcome the thermal deficiencies
common to conventional petroleum oils. Volatilization (burn-off), oxidation and
excessive deposit formation from high heat are greatly reduced. Viscosity thickening is
controlled and engines run cleaner, promoting cooler operation and long engine life in
air- or liquid-cooled engines. In addition, the higher viscosity of AMSOIL 20W-50 Synthetic
Motor Oil may help reduce motor oil consumption in equipment that experiences
higher-than-normal usage rates when lower-viscosity lubricants are installed.

Extends Drain Intervals in Gasoline
and Diesel Engines
Superior synthetic base oil and additive technology exceeds the requirements of
both gasoline and diesel engines. Premium Protection Motor Oil is designed to
neutralize acids, disperse soot and last longer in service than conventional oils.

APPLICATIONSAMSOIL Premium Protection Synthetic Motor Oil is recommended
for air- and liquid-cooled, large or small gasoline and diesel
engines, transmissions and chaincase applications where
20W-50 oils are required with any of the following
specifications:

API SL, SJ, SH, SG

API CI-4+, CI-4, CH-4, CF, CF-2

ISO-L-EMA

Caterpillar* ECF-1

JASO MA (Motorcycle)

MAN* 271/3275

MTU Type 2

Cummins* 20071/20072/20076/20077

Volvo*, VDS-2, VDS

Mack* EO-M+, EO-M

ACEA A3/B3, E3, E5

MB 228.1, 228.3, 229.1

Detroit Diesel* 93K214

MIXING AMSOILAMSOIL Synthetic 20W-50 Premium
Protection Motor Oil is compatible with conventional
and synthetic motor oils. Mixing AMSOIL motor oils with
other oils, however, will shorten the oil life expectancy and
reduce the performance benefits. AMSOIL does not support
extended drain intervals where oils have been mixed.
Aftermarket oil additives are not recommended for
use with AMSOIL Synthetic Oils.

SERVICE LIFE
AMSOIL Synthetic 20W-50 Premium Protection Motor Oil is recommended for extended intervals in unmodified, mechanically-sound vehicles or equipment as follows:

Diesel Engine Service
•Normal Service - Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
•Severe Service - Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.

Gasoline Engine Service
•Normal and Severe Service - Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.

Motorcycles, Small Engines, Stationary Engines, Heavy Equipment and Other Applications
•Extend drain intervals based on oil analysis or follow the manufacturer-recommended drain interval.

AMSOIL Ea Full-Flow Oil Filters are designed for extended drain intervals.
They stop smaller particles, flow more oil and last longer than regular filters.
For best performance, use AMSOIL Ea Full-Flow Oil Filters and replace at the time of oil change.
Other oil filters should be changed at standard OEM* intervals.

*OEM - Original Equipment Manufacturer

OIL ANALYZERS INC., 715-395-0222, is a division of AMSOIL that provides cost-effective, quality oil analysis services.
For more information on product applications and service life,
refer to the AMSOIL Product Recommendation and Drain Interval Guide (G1490).

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended
application and according to the recommendations in the Material
Safety Data Sheet (MSDS). An MSDS is available via the Internet at www.amsoil.com
or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute.
Return used oil to collection centers.

* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is
made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

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All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are AMSOIL-engineered for use in the applications shown.